bug#60467: 30.0.50; primitive-undo: Changes to be undone by function different from announced

[Eli Zaretskii]

> Cc: 60467@debbugs.gnu.org, Gregory Heytings <gregory@heytings.org>,
>  Ihor Radchenko <yantar92@posteo.net>
> Date: Mon, 09 Jan 2023 01:03:43 -0500
> From:  Stefan Monnier via "Bug reports for GNU Emacs,
>  the Swiss army knife of text editors" <bug-gnu-emacs@gnu.org>
> 
> Thanks.  So maybe we should strip timestamps on the release branch
> (just to be on the safe side) and keep them on `master` (since it's
> likely that we don't need to filter them out, which gives simpler code
> and might even be arguably more correct).
> 
> On `emacs-29` the patch I suggest is:

Fine with me, thanks.